KBB.com 5-Year Cost to Own Awards. Boasts 26 Highway MPG and 19 City MPG! Dealer Certified Pre-Owned. This Lexus RX boasts a Regular Unleaded V-6 3.5 L/211 engine powering this Automatic transmission. Wheels: 20 x 8 F SPORT w/Dark Metallic Finish -inc: 10-spoke aluminum... via LIUsedCars